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Q1. | The capacitance of a capacitor is not affected by |

A. | area of plates [Wrong Answer] |

B. | thickness of plates [Correct Answer] |

C. | ∈_{r} [Wrong Answer] |

D. | distance between plates [Wrong Answer] |

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Explanation:-
Answer : BDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ A three-section RC phase shift oscillator has R = 10K ohms and C = 0.001 μF. If the oscillator is to be made variable using the same value of R, what should be the value of capacitor to obtain a frequency if 1 kHz?

636 pF

180 pF

65 pF

30 pF

⇒ μ

_{0}= 8.85 x 10

^{-12}F/m.

TRUE

FALSE

⇒ VLF waves are used for communication system because

of low power requirement

they are least prone to distortion

they penetrate the ionosphere easily

the transmitting antennas are of convenient size

⇒ As compared to tuned radio frequency receivers which of the following is the advantage of using superheterodyne receivers?

High gain and better sensitivity

Better selectivity at high frequencies

Stability

Noise suppression

⇒ Which of the following is 'synchronous'?

Half adder

Full adder

R-S flip-flop

Clocked R-S flip-flop

⇒ The maximum effective aperture of a microwave antenna which has a directivity of 900, will be

71.619 λ

^{2}

716.19 λ

^{2}

7161.9 λ

^{2}

71619 λ

^{2}

⇒ The primary constants of a transmission line are

R and L

R, L and C

R and C

R, L, G and C

⇒ Programs like compilers, assemblers etc. are stored in a mircocomputer in

registers

cache memory

primary memory

mass storage

⇒ A digital voltmeter has a 4 1/2 digit display. The 1 V range can measure voltage up to

0.9999 V

1.9999 V

0.199 V

9.999 V

⇒ In an op-amp a common mode signal is applied to

inverting terminal

non-inverting terminal

both terminals

one or both the terminals

⇒ An LED has a rating of 2 V and 10 mA. It is used along with 6V battery. The range of series resistance is

0 to 200 Ω

200 - 400 Ω

200 Ω and above

400 Ω and above

⇒ A memoryless source emits

*n*symbols each with a probability

*p*. The entropy of the source as a function of

*n*

increases as log

*n*

decreases as log (1/

*n*)

increases as

*n*

increases as

*n*log

*n*

⇒ The Hilbert transform of cos ω

_{1}

*t*+ sin ω

_{2}

*t*is

sin ω

_{1}

*t*+ cos ω

_{2}

*t*

sin ω

_{1}

*t*- cos ω

_{2}

*t*

cos ω

_{1}

*t*- cos ω

_{2}

*t*

- sin ω

_{1}

*t*+ cos ω

_{2}

*t*

⇒ It is desired to reduce distortion in an amplifier from 8% to 2% by using 5% negative feedback. The open and closed loop gains respectively are

60 and 15

15 and 60

6 and 1.5

1.5 and 6

⇒ The speed at which axial electric field due to signal advances in a TWT is equal to

speed of light

(speed of light) (helix pitch helix circumference)

(speed of light) (helix circumference helix pitch)

(speed of light) (helix pitch) (helix circumference)

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | RF amplifier | 1. | Amplifier received carrier and sidebands |

B. | Loudspeaker | 2. | Gives acoustic output |

C. | Demodulator | 3. | Has IF input and AF output |

D. | IF amplifier | 4. | Fixed-tuned to intermediate frequency |

A-1, B-2, C-3, D-4

A-2, B-1, C-3, D-4

A-3, B-4, C-1, D-2

A-1, B-4, C-3, D-2

⇒ If a signal band limited for

*f*is sampled at a rate less than 2

_{m}*f*the reconstructed signal will be

_{m}smaller in amplitude

distorted

having higher frequencies suppressed

none of the above

⇒ The divergence of the electric field intensity at any point equals

1/4 pε

_{0}times the volume charge density

l/ε

_{0}times the volume charge density at that point

ε

_{0}times the volume charge density at that point

the volume charge density at that point

⇒ For the system of the given figure, the undamped natural frequency of closed loop pole

2 rad/sec

1 rad/sec

0.5 rad/sec

0.25 rad/sec

⇒ A TR (transmitter receiver) tube has

low loss for low power signals and high

high loss for low power signals and low loss for high level signal

low loss for both low level and high level signals

high loss for both low level and high level signals

⇒ The efficiency of a horn speaker is about

0.1

0.4

0.6

0.8

⇒ In FM noise can be decreased by a feature that AM does not have

increasing deviation

decreasing deviation

reducing modulation index

increasing modulation index

⇒ In figure, Z

_{a}= 100∠50°, Z

_{b}= 300∠-90° and Z

_{c}= 200∠0°. For balanced condition, Z

_{d}will

600∠ - 40°

600∠140°

600∠ - 140°

150∠140°

⇒ By connecting external resistances to a differential amplifier we can adjust

voltage gain

bandwidth

both voltage gain and bandwidth

none of the above

⇒ For very low frequencies, log magnitude for the given figur

0 dB

-3 dB

3 dB

10 dB

⇒

*n*-channel MOS is

slower than

*p*-channel MOS

faster than

*p*-channel MOS

same as

*p*-channel MOS

none of these

⇒ Earth's curvature affects the effective height of antenna.

TRUE

FALSE

⇒ In a class C operation V

_{CC}= 40 V and V

_{CE(sat)}= 0.4 V. The efficiency is

0.9

0.495

0.01

0.005

⇒ Present day HVDC converters are all

3 pulse converters

6 pulse converters

12 pulse converters

either 6 pulse or 12 converters

⇒ The dynamic characteristics of capacitive transducer are similar to those of

LP filter

HP filter

notch filter

band stop filter